Not so much Gratuitous cat pictures as Gratuitous Annoyed cat pictures.
For all that it looks like Kai is a bit annoyed, and squishing Zev, he calmed down after a few minutes, and was actually snoozing on both the Tram and Train journeys! Zev was more all big eyes and looking around to see what was happening.
A shoulder strap on the carrier worked, and actually made it quite easy to move them around (it's a short walk from the station to the cattery in Chessington), on past experience even a lighter load (ie Talisker) was pretty hard on my arms, so it was much easier. I don't think I'll be able to do it like this next year though. The two of them fitted in one carrier OK, but it wasn't exactly spacious, and once Zev is a bit larger, neither will be able to move around, so I'll have to use two carriers in future (or get a bigger one).